21301231342433 has 4 divisors (see below), whose sum is σ = 24344264391360. Its totient is φ = 18258198293508.

The previous prime is 21301231342429. The next prime is 21301231342453. The reversal of 21301231342433 is 33424313210312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21301231342433 - 2² = 21301231342429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21301231342433.

It is not an unprimeable number, because it can be changed into a prime (21301231342453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521516524453 + ... + 1521516524466.

It is an arithmetic number, because the mean of its divisors is an integer number (6086066097840).

Almost surely, 2^{21301231342433} is an apocalyptic number.

It is an amenable number.

21301231342433 is a deficient number, since it is larger than the sum of its proper divisors (3043033048927).

21301231342433 is an equidigital number, since it uses as much as digits as its factorization.

21301231342433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043033048926.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 21301231342433 its reverse (33424313210312), we get a palindrome (54725544552745).

The spelling of 21301231342433 in words is "twenty-one trillion, three hundred one billion, two hundred thirty-one million, three hundred forty-two thousand, four hundred thirty-three".